Air compressor



FIG. 1 is a front perspective view of an air compressor, showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a right side view thereof; a let side view is a mirror image of the right side view, and thus omitted.

The portions shown in broken lines in FIGS. 1-6 are for illustrative purposes only and form no part of the claimed design. The bottom view is flat and non-ornamented, and thus omitted. 

The ornamental design for an air compressor, as shown and described. 